The temperature on March 30, 1955 was between -1.6 °C and 4.8 °C and averaged 1.4 °C. There was 11.7 hours of sunshine (91%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
February 13 » Israel obtains four of the seven Dead Sea Scrolls.
April 12 » The polio vaccine, developed by Dr. Jonas Salk, is declared safe and effective.
April 24 » The Bandung Conference ends: Twenty-nine non-aligned nations of Asia and Africa finish a meeting that condemns colonialism, racism, and the Cold War.
August 20 » Battle of Philippeville: In Morocco, a force of Berbers from the Atlas Mountains region of Algeria raid two rural settlements and kill 77 French nationals.
November 5 » After being destroyed in World War II, the rebuilt Vienna State Opera reopens with a performance of Beethoven's Fidelio.
December 8 » The Flag of Europe is adopted by Council of Europe.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I27466.php : accessed September 24, 2026), "Yvonne van San (-1955)".
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